Capn Odin wrote: ↑
19 Sep 2019, 13:05
I woke to the truth just recently the Earth is flat and I can prove it.
Aight, i'll bite right into the bait!
Who says planes do not correct their trajectories? The plane does correct itself a lot during flight time!
The dynamics through which certain models of aircrafts are more (or less) stable during flights (specially with autopilot turned on), however, are not as easy to explain, and are highly dependant on aircraft design. But in any case, if there were actually no controls and no corrections in the angle of attack at all, a flat earth alone would NOT make an aircraft fly a straight line perfectly in parallel to ground without any corrections at all. Wind, turbulence, air currents, etc would all still be a thing. Therefore, correction ARE made regularly. Aircrafts actually have many instruments that allow corrections in the angle of attack to be made, including: The Attitude Indicator, the Altimeter, the Vertical Speed Indicator, etc. These corrections will account for any cause of variation, not just earths curvature (hence why this whole talk about earths curvature being "a key big problem for aviation" is just flat-earthers imagination).
If you still think earths curvature is a big problem for aviation, consider this: flat-earthers have calculated that earths curvature means there is "an amazing 8 inch drop for every mile". This "amazing number that acumulates over time" would thus have to be accounted for, which, according to them, would be "a big problem for aviation".
But is it really that big of deal? Let's look at another even bigger problem: a skilled pilot cannot manually fly an aircraft with more than about 2º accuracy (source
So if ~2º error is considered okay for a skilled pilot, how much distortion does a 1º error in flight trajectory causes every mile?
Tan(1) = 0.0175
1 mile = 63360"
63360 * 0.0175 = 1108"
Thats right! only 1 degree off in the angle of attack means that the plane will either rise or fall more than a thousand inches per mile! (Which is actually well within the expected range of error for uncorrected manual flights).
So as you can see, this 8 inch drop every mile is not even a big deal at all. Much bigger corrections in flight trajectory are regularly made by pilots (or autopilots). Planes DO NOT fly absolutely straight line trajectories (they never had to in the first place: all thanks to regular instruments and trajectory corrections).
Refraction occurs when light enters a mean of higher or lower refractive index. If the mean is basically the same (air at sea level), no refraction occurs. This means refraction is NOT responsible for the sinking of objects at the horizon.
When you parachute from a plane, you will fall from a place of lower air density to a place of higher air density. Yet, you are accelerating downwards.
The key point is that the earth has a low angular velocity. This angular velocity (and not the straight vector velocity) is what causes the phenomenom you are observing in the tennis ball. You can see this page
for a formula that describes centripetal acceleration and how angular velocity is the key component.
If the tides were caused by the entire earth rising and falling, high tides would occur at the same exact time everywhere in the planet, regardless of it being daytime or nighttime in each location. This is obviously not the case.
Perspective is a wonderful thing isn't it?
In the picture below, would you assume the sun is right above tree height?
Sea level pressure (1 atm) is the result of the weight of the air in the atmosphere (the air that is above sea level). If you go up towards outerspace, less and less air weight is above your head and so less and less pressure will be present. This can be proven by the fact that if you climb a big mountain, you will experience ever decreasing levels of pressure in the air, to the point where most people will need oxygen tanks for climbing the everest.
The conclusion is that there is actually no pressure diferential at all in the atmosphere/outerspace boundaries.